fix(backend): don't hardcode success reponse string

Linter doesn't like repeated strings, neither should I

internal/mapper/const.go

@@ -0,0 +1,3 @@
+package mapper
+
+const AlertmanagerStatusString = "success"

internal/mapper/v015/status.go

@@ -70,7 +70,7 @@ func (s StatusMapper) Decode(source io.ReadCloser) (models.AlertmanagerStatus, e
 		return status, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return status, fmt.Errorf("status endpoint returned status value '%s'", resp.Status)
 	}
 

internal/mapper/v04/alerts.go

@@ -87,7 +87,7 @@ func (m AlertMapper) Decode(source io.ReadCloser) ([]models.AlertGroup, error) {
 		return groups, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return groups, errors.New(resp.Error)
 	}
 

internal/mapper/v04/silences.go

@@ -83,7 +83,7 @@ func (m SilenceMapper) Decode(source io.ReadCloser) ([]models.Silence, error) {
 		return silences, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return silences, errors.New(resp.Error)
 	}
 

internal/mapper/v04/status.go

@@ -70,7 +70,7 @@ func (s StatusMapper) Decode(source io.ReadCloser) (models.AlertmanagerStatus, e
 		return status, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return status, fmt.Errorf("status endpoint returned status value '%s'", resp.Status)
 	}
 

internal/mapper/v05/alerts.go

@@ -86,7 +86,7 @@ func (m AlertMapper) Decode(source io.ReadCloser) ([]models.AlertGroup, error) {
 		return groups, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return groups, errors.New(resp.Error)
 	}
 

internal/mapper/v05/silences.go

@@ -73,7 +73,7 @@ func (m SilenceMapper) Decode(source io.ReadCloser) ([]models.Silence, error) {
 		return silences, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return silences, errors.New(resp.Error)
 	}
 

internal/mapper/v061/alerts.go

@@ -88,7 +88,7 @@ func (m AlertMapper) Decode(source io.ReadCloser) ([]models.AlertGroup, error) {
 		return groups, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return groups, errors.New(resp.Error)
 	}
 

internal/mapper/v062/alerts.go

@@ -92,7 +92,7 @@ func (m AlertMapper) Decode(source io.ReadCloser) ([]models.AlertGroup, error) {
 		return groups, err
 	}
 
-	if resp.Status != "success" {
+	if resp.Status != mapper.AlertmanagerStatusString {
 		return groups, errors.New(resp.Error)
 	}